[BUG] Notification plugin hangs at PluginBaseAction class

[lezzago]

Describe the bug
When I call the GetNorificationConfig API for channels that do not exist. I get an error like below. And if I call CreateNotificationConfig API for the channels that did not exist, the code hangs at this line.

[2021-07-19T21:17:27,047][ERROR][o.o.b.OpenSearchUncaughtExceptionHandler] [3c22fbe8fc7e.ant.amazon.com] uncaught exception in thread [DefaultDispatcher-worker-1]
org.opensearch.OpenSearchStatusException: NotificationConfig [GYcdwnoBFdGdFG5MPAzu, GocdwnoBFdGdFG5MVAw1, GIcdwnoBFdGdFG5MDgx3] not found
	at org.opensearch.notifications.index.ConfigIndexingActions.info(ConfigIndexingActions.kt:297) ~[opensearch-notifications-1.0.0.jar:1.0.0]
	at org.opensearch.notifications.index.ConfigIndexingActions.get(ConfigIndexingActions.kt:254) ~[opensearch-notifications-1.0.0.jar:1.0.0]
	at org.opensearch.notifications.action.GetNotificationConfigAction.executeRequest(GetNotificationConfigAction.kt:82) ~[opensearch-notifications-1.0.0.jar:1.0.0]
	at org.opensearch.notifications.action.GetNotificationConfigAction.executeRequest(GetNotificationConfigAction.kt:48) ~[opensearch-notifications-1.0.0.jar:1.0.0]
	at org.opensearch.notifications.action.PluginBaseAction$doExecute$1.invokeSuspend(PluginBaseAction.kt:80) ~[opensearch-notifications-1.0.0.jar:1.0.0]
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) [kotlin-stdlib-1.4.32.jar:1.4.32-release-371 (1.4.32)]
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106) [kotlinx-coroutines-core-jvm-1.4.3.jar:?]
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571) [kotlinx-coroutines-core-jvm-1.4.3.jar:?]
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750) [kotlinx-coroutines-core-jvm-1.4.3.jar:?]
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678) [kotlinx-coroutines-core-jvm-1.4.3.jar:?]
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665) [kotlinx-coroutines-core-jvm-1.4.3.jar:?]

To Reproduce
Call getNotificationConfig API for a non-existent channel and then try create a channel

Expected behavior
Notification should catch the exception and return empty response or catch and throw NotFoundException instead.

Plugins
Please list all plugins currently enabled.

Screenshots
If applicable, add screenshots to help explain your problem.

Host/Environment (please complete the following information):

• OS: [e.g. iOS]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.

[lezzago]

This appears to be fixed after pulling in latest changes from common-utils and the testing branch for notification